2001/08/17 by C.G. Bezerra, C. G. Bezerra, E. L. Albuquerque +3 · 1 citation
Materials Science · Physics and Astronomy · #Magnetic properties of thin films #Quasicrystal Structures and Properties #Theoretical and Computational Physics #cond-mat.stat-mech
paper · pdf · doi:10.1016/s0378-4371(01)00401-0
13 pages, 4 ps figures, Submitted to Physica A
arxiv created 2001/08/17 · openalex publication_date 2001/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A theoretical study of the specific heat C(T) as a function of temperature in Fibonacci magnetic superlattices is presented. We consider quasiperiodic structures composed of ferromagnetic films, each described by the Heisenberg model, with biquadratic and bilinear coupling between them. We have taken the ratios between the biquadratic and bilinear exchange terms according to experimental data recently measured for different regions of their regime. Although some previous properties of the spin wave specific heat are also reproduced here, new features appear in this case, the most important of them being an interesting broken-symmetry related to the interlayer biquadratic term.